#!/bin/sh

if [ $# -eq 0 ] || [ "$1" = "-h" ]; then
	cat<<EOF
Usage: ${0##*/} FOLDERS

Convert all 'bad' encoding to UTF-8/LF.

WARNING: It will fail for encodings other the one explicitly supported below.

EOF
fi

if ! command -v recode >/dev/null 2>&1; then
	echo "recode needed."
	exit
fi

for i ; do
	while IFS= read -r j; do
		CODING=$(file "$j")

		if [ -n "$(echo $CODING | grep 'ISO-8859')" ]; then
			echo "ISO-8859:   [$j]"
			recode latin1..utf-8 "$j"

		elif [ -n "$(echo $CODING | grep 'Non-ISO extended-ASCII')" ]; then
			echo "cp1252:     [$j]"
			recode cp1252..utf-8 "$j"

		elif [ -n "$(echo $CODING | grep 'UTF-16 Unicode text')" ]; then
			echo "UTF-16:     [$j]"
			recode utf-16..utf-8 "$j"

		elif [ -n "$(echo $CODING | grep 'UTF-8 Unicode (with BOM)')" ]; then
			echo "UTF-8 BOM:  [$j]"
			ex -sc '1s/^.//|xit' "$j"
			## The following commands are funny alternatives, but are completely
			## overkill.
			# dd iflag=skip_bytes skip=3 if=file.srt of=temp.srt
			# dd bs=1 skip=3 if=file.srt of=temp.srt
			# tail -c +32 file.srt > temp.srt
		fi

		if [ -n "$(echo $CODING | grep 'CRLF')" ]; then
			echo "CRLF:       [$j]"
			ex -sc '%s/
//g|xit' "$j"
		fi

	done <<EOF
$(find "$i" -type f -size -50M -print)
EOF
done